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A/C problem 900 1991

posted by  sped on  Thu Jul 17 19:13 CST 2003
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Before you try all that under dash stuff, check the big vacuum hose that goes down to the underside of the front bumper. You will see where the hose goes in but, the vacuum reserve canister is a little hard to see. On the opposite side of that canister is a plug that is in the opposite place where the hose goes , that plug gets dryrotted and falls off causing a big vacuum leak. Every time you step on it it looses its reserve vacuum, which can cause it to blow out of the defrost vents. I hope thats it.






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